Genetic variety makes that a wide range.. even if you do most things well.
With a good to amazing yielding genetics, 50-70g/sq ft should be doable. A bunch of seeds will be tough to get there compared to clones of known potential yield. One under-performing plant ruins the average.
If you can regularly approach 50g/sq ft, you are probably doing things fine. This will help you determine how to adjust things like pot size and such and see if it has any impact.. try to change 1 or few things at at ime so you can better attribute what effect it had. Genetic diversity from seed to seed is a hell of a fog of war in this regard.
that pot size is a bit on the small side. If using 'hydro' type nutes in a soilless medium, i'd stick to 3sq ft or less - maybe even 2sq ft canopy at most, if photoperiod, and with autos you don't get a choice in the matter anyway, lol. You can make do with less volume of medium and have bigger yields with hydro nutes compared to soil. It'll take longer to be affected by rootbound symptoms. ~4 week vege at most... going over may or may not add to yield as you might be up near max size plant you can get out of a 10L pot while maintaining health.
so, 100-150g plant are a good target. if you do SoG, it'll be less per plant, but overall 50g/sq ft is still a good goal to help decide future adjustments.